Math, asked by Bhargabi8850, 10 months ago

evaluate (5+root2)( 5-root2)

Answers

Answered by pari2001

3

Step-by-step explanation:

$= (5 + \sqrt{2} )(5 - \sqrt{2} ) \\ = 5(5 - \sqrt{2} ) + \sqrt{2} (5 - \sqrt{2} ) \\ = 25 - 5 \sqrt{2} + 5 \sqrt{2} - 2 \\ = 25 - 2 \\ = 23$

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